All-time weather records — Grantsburg, WI

Record high
105.1°F
July 16, 2006
Record low
-44.0°F
January 14, 1965
Wettest day
7.83 in
October 5, 2005

Climate change signal in Grantsburg

19.7%

of Grantsburg's all-time daily heat records were set in the last decade (72 of 366 records since 2015).

3.3%

of all-time daily cold records were set in the last decade (12 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1950s
41
122
1960s
44
98
1970s
12
55
1980s
34
20
1990s
46
19
2000s
77
23
2010s
69
24
2020s
43
5

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1950, the latest in 2026. Period of observation: 1950-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 52.0°F — Jan 11, 2012 -44.0°F — Jan 14, 1965 1.14 in — Jan 18, 1996
February 64.9°F — Feb 27, 2026 -42.0°F — Feb 2, 1996 1.17 in — Feb 14, 2023
March 82.0°F — Mar 27, 2007 -38.9°F — Mar 1, 1962 1.81 in — Mar 16, 2016
April 95.0°F — Apr 22, 1980 -2.0°F — Apr 1, 1975 2.75 in — Apr 19, 2004
May 95.0°F — May 2, 1959 15.1°F — May 3, 1967 3.49 in — May 20, 1953
June 99.0°F — Jun 8, 2011 28.9°F — Jun 2, 1964 5.28 in — Jun 12, 1984
July 105.1°F — Jul 16, 2006 36.0°F — Jul 14, 1975 4.63 in — Jul 12, 2016
August 100.0°F — Aug 1, 2006 32.0°F — Aug 31, 1970 5.58 in — Aug 31, 1973
September 97.0°F — Sep 3, 2023 21.0°F — Sep 29, 1967 6.20 in — Sep 13, 2005
October 88.0°F — Oct 6, 2011 7.0°F — Oct 20, 1952 7.83 in — Oct 5, 2005
November 73.9°F — Nov 2, 2022 -24.0°F — Nov 30, 1964 2.04 in — Nov 17, 1996
December 60.1°F — Dec 3, 1982 -40.0°F — Dec 25, 1968 1.67 in — Dec 13, 1968

Click a month to see every daily record for that month in Grantsburg.